[ARC5] Why "Noodling" About Sweep Tubes?

Wed Oct 23 00:16:37 EDT 2013

On 22 Oct 2013 at 23:51, Roy Morgan wrote:

> Must have been quite a few years ago.  The prices went well above$100
> each used some time ago.  All due, I think, to the hi fi addicts over
> on the Pacific Rim.

Undoubtedly. Penta Labs was making new 211s. I bought a pair some time 
ago. I doubt if you can find those any more though.

> I wonder if the 803 tube is also thoriated tungsten.

Yes. It is. And it is a pentode, but not a beam tube either. PD is 125 watts. 
They make excellent EC oscillators.

803 is a very nice tube. So is 805, which is a triode, also with 125 watts PD.

In fact, Dave might consider replacing his 211s with 805s, although since 
they are triodes, the audio-phools just love them....and abuse them to 
destruction.

>  I do have a GO-9
> that uses them, and a couple or more of spares.

GO-9 is a neat rig. Wish I had one....and the space to put it.

Ken W7EKB